Sugar gliders are small marsupials that live their lives in trees, rarely (if ever), touching the ground. A glider will launch himself from a tree, spreading his limbs to catch air with the membrane that runs from his wrists to his ankles. This serves to slow their descent as they fall and they can even control the glide by adjusting the curvature of the membrane with their limbs. They have been known to glide over 150 feet. These animals are very social, living in family groups with up to 7 adults and their young in one nest. The large family size also helps to conserve heat at night. They mark their territory with scent glands and urine and they communicate with a wide range of vocalizations.